Hello. I'm 15, and Im 4 days late on my period. My boyfriend and I recently started having sex in the past month. We have sex almost everyday. Within the past month, I also started school. I heard change in schedule, stress, and illness can cause a delay. About a week ago, I got a bladder infection, so I started taking a pill for it. Everytime we've had sex, it's been unprotected, but he pulls out when he cums. He's only came three times, all of which he obviously pulled out on time. I was wondering if it could be a combination of me starting school, me having constant sex, the medication I'm on, and also me stressing about being pregnant thats delaying my period. I have plans for my future and a child is not in them. Please tell me I'm not pregnant.